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IDEDiskDevice: Support reading multiple sectors at a time with DMA.

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This is another sizable improvement to GCC compile times.
This commit is contained in:
Andreas Kling 2019-05-19 04:40:30 +02:00
parent ed79116e94
commit c7d8aa6969
4 changed files with 27 additions and 14 deletions
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4
Kernel/Devices/IDEDiskDevice.h
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@ -24,6 +24,7 @@ public:
virtual unsigned block_size() const override;
virtual bool read_block(unsigned index, byte*) const override;
virtual bool write_block(unsigned index, const byte*) override;
virtual bool read_blocks(unsigned index, word count, byte*) override;
protected:
IDEDiskDevice();
@ -37,7 +38,7 @@ private:
void initialize();
bool wait_for_irq();
bool read_sector_with_dma(dword sector, byte*);
bool read_sectors_with_dma(dword sector, word count, byte*);
bool read_sectors(dword start_sector, word count, byte* buffer);
bool write_sectors(dword start_sector, word count, const byte* data);
@ -50,6 +51,7 @@ private:
PCI::Address m_pci_address;
PhysicalRegionDescriptor m_prdt;
RetainPtr<PhysicalPage> m_dma_buffer_page;
word m_bus_master_base { 0 };
};